Houston-area residents say in a newly filed class-action lawsuit that tests have detected toxic substances in soil, water and ash samples taken miles from a chemical plant that flooded during Hurricane Harvey several weeks ago, caught fire and exploded

Nearly 20 Houston-area residents say test results have detected toxic substances in soil, water and ash samples taken miles from a chemical plant that flooded during Hurricane Harvey several weeks ago, caught fire and exploded

A pediatrician who helped call attention to childhood health risks from exposure to lead in Flint, Michigan's water supply is one of five people being honored with $250,000 prizes from the Pittsburgh-based Heinz Family Foundation

The Trump administration delayed an Obama-era rule that would have tightened safety requirements for companies that store large quantities of dangerous chemicals such as a chemical plant near Houston that exploded early Thursday

Swiss scientist Albert Hofmann may have invented LSD in the 1930s, and Timothy Leary was clearly its most prominent frontman in the 1960s. But Nicholas Sand was the chemist who created the most famous version